﻿using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Data.Common;
using System.Collections.Generic;
using MyLib;

namespace DataBaseLibrary
{
    /// <summary>
    /// 数据访问抽象基础类
    /// Copyright (C) Maticsoft
    /// </summary>
    public abstract class DbHelperSQL
    {
        //数据库连接字符串(web.config来配置)，多数据库可使用DbHelperSQLP来实现.
        public static string connectionString = PubConstant.ConnectionString;     		
        public DbHelperSQL()
        {            
        }

        #region 公用方法
        /// <summary>
        /// 判断是否存在某表的某个字段
        /// </summary>
        /// <param name="tableName">表名称</param>
        /// <param name="columnName">列名称</param>
        /// <returns>是否存在</returns>
        //public static bool ColumnExists(string tableName, string columnName)
        //{
        //    string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
        //    object res = GetSingle(sql);
        //    if (res == null)
        //    {
        //        return false;
        //    }
        //    return Convert.ToInt32(res) > 0;
        //}
        public static int GetMaxID(string FieldName, string TableName)
        {
            string strsql = "select max(" + FieldName + ")+1 from " + TableName;
            object obj = GetSingle(strsql);
            if (obj == null)
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
        public static bool Exists(string strSql)
        {
            object obj = GetSingle(strSql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// <summary>
        /// 表是否存在
        /// </summary>
        /// <param name="TableName"></param>
        /// <returns></returns>
        //public static bool TabExists(string TableName)
        //{
        //    string strsql = "select count(*) from sysobjects where id = object_id(N'[" + TableName + "]') and OBJECTPROPERTY(id, N'IsUserTable') = 1";
        //    //string strsql = "SELECT count(*) FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[" + TableName + "]') AND type in (N'U')";
        //    object obj = GetSingle(strsql);
        //    int cmdresult;
        //    if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
        //    {
        //        cmdresult = 0;
        //    }
        //    else
        //    {
        //        cmdresult = int.Parse(obj.ToString());
        //    }
        //    if (cmdresult == 0)
        //    {
        //        return false;
        //    }
        //    else
        //    {
        //        return true;
        //    }
        //}
        public static bool Exists(string strSql, params SqlParameter[] cmdParms)
        {
            object obj = GetSingle(strSql, cmdParms);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        #endregion

        #region  执行简单SQL语句

        /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string SQLString)
        {
            return DataAccess.Instance("BizDB").ExecuteNonQuery(SQLString);
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    using (SqlCommand cmd = new SqlCommand(SQLString, connection))
            //    {
            //        try
            //        {
            //            connection.Open();
            //            int rows = cmd.ExecuteNonQuery();
            //            return rows;
            //        }
            //        catch (System.Data.SqlClient.SqlException e)
            //        {
            //            connection.Close();
            //            throw e;
            //        }
            //    }
            //}
        }

        //public static int ExecuteSqlByTime(string SQLString, int Times)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        using (SqlCommand cmd = new SqlCommand(SQLString, connection))
        //        {
        //            try
        //            {
        //                connection.Open();
        //                cmd.CommandTimeout = Times;
        //                int rows = cmd.ExecuteNonQuery();
        //                return rows;
        //            }
        //            catch (System.Data.SqlClient.SqlException e)
        //            {
        //                connection.Close();
        //                throw e;
        //            }
        //        }
        //    }
        //}
      
        /// <summary>
        /// 执行Sql和Oracle滴混合事务
        /// </summary>
        /// <param name="list">SQL命令行列表</param>
        /// <param name="oracleCmdSqlList">Oracle命令行列表</param>
        /// <returns>执行结果 0-由于SQL造成事务失败 -1 由于Oracle造成事务失败 1-整体事务执行成功</returns>
        //public static int ExecuteSqlTran(List<CommandInfo> list, List<CommandInfo> oracleCmdSqlList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        SqlCommand cmd = new SqlCommand();
        //        cmd.Connection = conn;
        //        SqlTransaction tx = conn.BeginTransaction();
        //        cmd.Transaction = tx;
        //        try
        //        {
        //            foreach (CommandInfo myDE in list)
        //            {
        //                string cmdText = myDE.CommandText;
        //                SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters;
        //                PrepareCommand(cmd, conn, tx, cmdText, cmdParms);
        //                if (myDE.EffentNextType == EffentNextType.SolicitationEvent)
        //                {
        //                    if (myDE.CommandText.ToLower().IndexOf("count(") == -1)
        //                    {
        //                        tx.Rollback();
        //                        throw new Exception("违背要求"+myDE.CommandText+"必须符合select count(..的格式");
        //                        //return 0;
        //                    }

        //                    object obj = cmd.ExecuteScalar();
        //                    bool isHave = false;
        //                    if (obj == null && obj == DBNull.Value)
        //                    {
        //                        isHave = false;
        //                    }
        //                    isHave = Convert.ToInt32(obj) > 0;
        //                    if (isHave)
        //                    {
        //                        //引发事件
        //                        myDE.OnSolicitationEvent();
        //                    }
        //                }
        //                if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine)
        //                {
        //                    if (myDE.CommandText.ToLower().IndexOf("count(") == -1)
        //                    {
        //                        tx.Rollback();
        //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "必须符合select count(..的格式");
        //                        //return 0;
        //                    }

        //                    object obj = cmd.ExecuteScalar();
        //                    bool isHave = false;
        //                    if (obj == null && obj == DBNull.Value)
        //                    {
        //                        isHave = false;
        //                    }
        //                    isHave = Convert.ToInt32(obj) > 0;

        //                    if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave)
        //                    {
        //                        tx.Rollback();
        //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须大于0");
        //                        //return 0;
        //                    }
        //                    if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)
        //                    {
        //                        tx.Rollback();
        //                        throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须等于0");
        //                        //return 0;
        //                    }
        //                    continue;
        //                }
        //                int val = cmd.ExecuteNonQuery();
        //                if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0)
        //                {
        //                    tx.Rollback();
        //                    throw new Exception("SQL:违背要求" + myDE.CommandText + "必须有影响行");
        //                    //return 0;
        //                }
        //                cmd.Parameters.Clear();
        //            }
        //            string oraConnectionString = PubConstant.GetConnectionString("ConnectionStringPPC");
        //            bool res = OracleHelper.ExecuteSqlTran(oraConnectionString, oracleCmdSqlList);
        //            if (!res)
        //            {
        //                tx.Rollback();
        //                throw new Exception("Oracle执行失败");
        //                // return -1;
        //            }
        //            tx.Commit();
        //            return 1;
        //        }
        //        catch (System.Data.SqlClient.SqlException e)
        //        {
        //            tx.Rollback();
        //            throw e;
        //        }
        //        catch (Exception e)
        //        {
        //            tx.Rollback();
        //            throw e;
        //        }
        //    }
        //}        
        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">多条SQL语句</param>		
        //public static int ExecuteSqlTran(List<String> SQLStringList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        SqlCommand cmd = new SqlCommand();
        //        cmd.Connection = conn;
        //        SqlTransaction tx = conn.BeginTransaction();
        //        cmd.Transaction = tx;
        //        try
        //        {
        //            int count = 0;
        //            for (int n = 0; n < SQLStringList.Count; n++)
        //            {
        //                string strsql = SQLStringList[n];
        //                if (strsql.Trim().Length > 1)
        //                {
        //                    cmd.CommandText = strsql;
        //                    count += cmd.ExecuteNonQuery();
        //                }
        //            }
        //            tx.Commit();
        //            return count;
        //        }
        //        catch
        //        {
        //            tx.Rollback();
        //            return 0;
        //        }
        //    }
        //}
        /// <summary>
        /// 执行带一个存储过程参数的的SQL语句。
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
        /// <returns>影响的记录数</returns>
        //public static int ExecuteSql(string SQLString, string content)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        SqlCommand cmd = new SqlCommand(SQLString, connection);
        //        System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
        //        myParameter.Value = content;
        //        cmd.Parameters.Add(myParameter);
        //        try
        //        {
        //            connection.Open();
        //            int rows = cmd.ExecuteNonQuery();
        //            return rows;
        //        }
        //        catch (System.Data.SqlClient.SqlException e)
        //        {
        //            throw e;
        //        }
        //        finally
        //        {
        //            cmd.Dispose();
        //            connection.Close();
        //        }
        //    }
        //}
        /// <summary>
        /// 执行带一个存储过程参数的的SQL语句。
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
        /// <returns>影响的记录数</returns>
        //public static object ExecuteSqlGet(string SQLString, string content)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        SqlCommand cmd = new SqlCommand(SQLString, connection);
        //        System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
        //        myParameter.Value = content;
        //        cmd.Parameters.Add(myParameter);
        //        try
        //        {
        //            connection.Open();
        //            object obj = cmd.ExecuteScalar();
        //            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
        //            {
        //                return null;
        //            }
        //            else
        //            {
        //                return obj;
        //            }
        //        }
        //        catch (System.Data.SqlClient.SqlException e)
        //        {
        //            throw e;
        //        }
        //        finally
        //        {
        //            cmd.Dispose();
        //            connection.Close();
        //        }
        //    }
        //}
        /// <summary>
        /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
        /// </summary>
        /// <param name="strSQL">SQL语句</param>
        /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
        /// <returns>影响的记录数</returns>
        //public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        SqlCommand cmd = new SqlCommand(strSQL, connection);
        //        System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image);
        //        myParameter.Value = fs;
        //        cmd.Parameters.Add(myParameter);
        //        try
        //        {
        //            connection.Open();
        //            int rows = cmd.ExecuteNonQuery();
        //            return rows;
        //        }
        //        catch (System.Data.SqlClient.SqlException e)
        //        {
        //            throw e;
        //        }
        //        finally
        //        {
        //            cmd.Dispose();
        //            connection.Close();
        //        }
        //    }
        //}

        /// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public static object GetSingle(string SQLString)
        {
            return DataAccess.Instance("BizDB").ExecuteScalar(SQLString);
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    using (SqlCommand cmd = new SqlCommand(SQLString, connection))
            //    {
            //        try
            //        {
            //            connection.Open();
            //            object obj = cmd.ExecuteScalar();
            //            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            //            {
            //                return null;
            //            }
            //            else
            //            {
            //                return obj;
            //            }
            //        }
            //        catch (System.Data.SqlClient.SqlException e)
            //        {
            //            connection.Close();
            //            throw e;
            //        }
            //    }
            //}
        }
        //public static object GetSingle(string SQLString, int Times)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        using (SqlCommand cmd = new SqlCommand(SQLString, connection))
        //        {
        //            try
        //            {
        //                connection.Open();
        //                cmd.CommandTimeout = Times;
        //                object obj = cmd.ExecuteScalar();
        //                if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
        //                {
        //                    return null;
        //                }
        //                else
        //                {
        //                    return obj;
        //                }
        //            }
        //            catch (System.Data.SqlClient.SqlException e)
        //            {
        //                connection.Close();
        //                throw e;
        //            }
        //        }
        //    }
        //}
        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public static IDataReader ExecuteReader(string strSQL)
        {
            //SqlConnection connection = new SqlConnection(connectionString);
            //SqlCommand cmd = new SqlCommand(strSQL, connection);
            //try
            //{
            //    connection.Open();
            //    SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            //    return myReader;
            //}
            //catch (System.Data.SqlClient.SqlException e)
            //{
            //    throw e;
            //}   
            return DataAccess.Instance("BizDB").ExecuteDataReader(strSQL);
        }
        /// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public static DataSet Query(string SQLString)
        {
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    DataSet ds = new DataSet();
            //    try
            //    {
            //        connection.Open();
            //        SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
            //        command.Fill(ds, "ds");
            //    }
            //    catch (System.Data.SqlClient.SqlException ex)
            //    {
            //        throw new Exception(ex.Message);
            //    }
            //    return ds;
            //}
            return DataAccess.Instance("BizDB").ExecuteDataSet(SQLString);
        }
        //public static DataSet Query(string SQLString, int Times)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        DataSet ds = new DataSet();
        //        try
        //        {
        //            connection.Open();
        //            SqlDataAdapter command = new SqlDataAdapter(SQLString, connection);
        //            command.SelectCommand.CommandTimeout = Times;
        //            command.Fill(ds, "ds");
        //        }
        //        catch (System.Data.SqlClient.SqlException ex)
        //        {
        //            throw new Exception(ex.Message);
        //        }
        //        return ds;
        //    }
        //}



        #endregion

        #region 执行带参数的SQL语句

        /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
        {
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    using (SqlCommand cmd = new SqlCommand())
            //    {
            //        try
            //        {
            //            PrepareCommand(cmd, connection, null, SQLString, cmdParms);
            //            int rows = cmd.ExecuteNonQuery();
            //            cmd.Parameters.Clear();
            //            return rows;
            //        }
            //        catch (System.Data.SqlClient.SqlException e)
            //        {
            //            throw e;
            //        }
            //    }
            //}
            List<DataParameter> table = new List<DataParameter>();
            foreach (SqlParameter para in cmdParms)
            {
                DataParameter dp = new DataParameter();
                dp.ParameterName = para.ParameterName;
                dp.Value = para.Value;
                dp.DbType = para.DbType;
                table.Add(dp);
            }

            return DataAccess.Instance("BizDB").ExecuteNonQuery(SQLString, table);
        }


        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        //public static void ExecuteSqlTran(Hashtable SQLStringList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        using (SqlTransaction trans = conn.BeginTransaction())
        //        {
        //            SqlCommand cmd = new SqlCommand();
        //            try
        //            {
        //                //循环
        //                foreach (DictionaryEntry myDE in SQLStringList)
        //                {
        //                    string cmdText = myDE.Key.ToString();
        //                    SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
        //                    PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
        //                    int val = cmd.ExecuteNonQuery();
        //                    cmd.Parameters.Clear();
        //                }
        //                trans.Commit();
        //            }
        //            catch
        //            {
        //                trans.Rollback();
        //                throw;
        //            }
        //        }
        //    }
        //}
        ///// <summary>
        ///// 执行多条SQL语句，实现数据库事务。
        ///// </summary>
        ///// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        //public static int ExecuteSqlTran(System.Collections.Generic.List<CommandInfo> cmdList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        using (SqlTransaction trans = conn.BeginTransaction())
        //        {
        //            SqlCommand cmd = new SqlCommand();
        //            try
        //            { int count = 0;
        //                //循环
        //                foreach (CommandInfo myDE in cmdList)
        //                {
        //                    string cmdText = myDE.CommandText;
        //                    SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters;
        //                    PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                           
        //                    if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine)
        //                    {
        //                        if (myDE.CommandText.ToLower().IndexOf("count(") == -1)
        //                        {
        //                            trans.Rollback();
        //                            return 0;
        //                        }

        //                        object obj = cmd.ExecuteScalar();
        //                        bool isHave = false;
        //                        if (obj == null && obj == DBNull.Value)
        //                        {
        //                            isHave = false;
        //                        }
        //                        isHave = Convert.ToInt32(obj) > 0;

        //                        if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave)
        //                        {
        //                            trans.Rollback();
        //                            return 0;
        //                        }
        //                        if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)
        //                        {
        //                            trans.Rollback();
        //                            return 0;
        //                        }
        //                        continue;
        //                    }
        //                    int val = cmd.ExecuteNonQuery();
        //                    count += val;
        //                    if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0)
        //                    {
        //                        trans.Rollback();
        //                        return 0;
        //                    }
        //                    cmd.Parameters.Clear();
        //                }
        //                trans.Commit();
        //                return count;
        //            }
        //            catch
        //            {
        //                trans.Rollback();
        //                throw;
        //            }
        //        }
        //    }
        //}
        ///// <summary>
        ///// 执行多条SQL语句，实现数据库事务。
        ///// </summary>
        ///// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        //public static void ExecuteSqlTranWithIndentity(System.Collections.Generic.List<CommandInfo> SQLStringList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        using (SqlTransaction trans = conn.BeginTransaction())
        //        {
        //            SqlCommand cmd = new SqlCommand();
        //            try
        //            {
        //                int indentity = 0;
        //                //循环
        //                foreach (CommandInfo myDE in SQLStringList)
        //                {
        //                    string cmdText = myDE.CommandText;
        //                    SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters;
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.InputOutput)
        //                        {
        //                            q.Value = indentity;
        //                        }
        //                    }
        //                    PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
        //                    int val = cmd.ExecuteNonQuery();
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.Output)
        //                        {
        //                            indentity = Convert.ToInt32(q.Value);
        //                        }
        //                    }
        //                    cmd.Parameters.Clear();
        //                }
        //                trans.Commit();
        //            }
        //            catch
        //            {
        //                trans.Rollback();
        //                throw;
        //            }
        //        }
        //    }
        //}
        ///// <summary>
        ///// 执行多条SQL语句，实现数据库事务。
        ///// </summary>
        ///// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        //public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        using (SqlTransaction trans = conn.BeginTransaction())
        //        {
        //            SqlCommand cmd = new SqlCommand();
        //            try
        //            {
        //                int indentity = 0;
        //                //循环
        //                foreach (DictionaryEntry myDE in SQLStringList)
        //                {
        //                    string cmdText = myDE.Key.ToString();
        //                    SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.InputOutput)
        //                        {
        //                            q.Value = indentity;
        //                        }
        //                    }
        //                    PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
        //                    int val = cmd.ExecuteNonQuery();
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.Output)
        //                        {
        //                            indentity = Convert.ToInt32(q.Value);
        //                        }
        //                    }
        //                    cmd.Parameters.Clear();
        //                }
        //                trans.Commit();
        //            }
        //            catch
        //            {
        //                trans.Rollback();
        //                throw;
        //            }
        //        }
        //    }
        //}
        /// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
        {
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    using (SqlCommand cmd = new SqlCommand())
            //    {
            //        try
            //        {
            //            PrepareCommand(cmd, connection, null, SQLString, cmdParms);
            //            object obj = cmd.ExecuteScalar();
            //            cmd.Parameters.Clear();
            //            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            //            {
            //                return null;
            //            }
            //            else
            //            {
            //                return obj;
            //            }
            //        }
            //        catch (System.Data.SqlClient.SqlException e)
            //        {
            //            throw e;
            //        }
            //    }
            //}

            List<DataParameter> table = new List<DataParameter>();
            foreach (SqlParameter para in cmdParms)
            {
                DataParameter dp = new DataParameter();
                dp.ParameterName = para.ParameterName;
                dp.Value = para.Value;
                dp.DbType = para.DbType;
                table.Add(dp);
            }

            return DataAccess.Instance("BizDB").ExecuteScalar(SQLString, table);
        }

        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public static IDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms)
        {
            //SqlConnection connection = new SqlConnection(connectionString);
            //SqlCommand cmd = new SqlCommand();
            //try
            //{
            //    PrepareCommand(cmd, connection, null, SQLString, cmdParms);
            //    SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            //    cmd.Parameters.Clear();
            //    return myReader;
            //}
            //catch (System.Data.SqlClient.SqlException e)
            //{
            //    throw e;
            //}
            //			finally
            //			{
            //				cmd.Dispose();
            //				connection.Close();
            //			}	

            List<DataParameter> table = new List<DataParameter>();
            foreach (SqlParameter para in cmdParms)
            {
                DataParameter dp = new DataParameter();
                dp.ParameterName = para.ParameterName;
                dp.Value = para.Value;
                dp.DbType = para.DbType;
                table.Add(dp);
            }

            return DataAccess.Instance("BizDB").ExecuteDataReader(SQLString, table);

        }

        /// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public static DataSet Query(string SQLString, params SqlParameter[] cmdParms)
        {
            //using (SqlConnection connection = new SqlConnection(connectionString))
            //{
            //    SqlCommand cmd = new SqlCommand();
            //    PrepareCommand(cmd, connection, null, SQLString, cmdParms);
            //    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
            //    {
            //        DataSet ds = new DataSet();
            //        try
            //        {
            //            da.Fill(ds, "ds");
            //            cmd.Parameters.Clear();
            //        }
            //        catch (System.Data.SqlClient.SqlException ex)
            //        {
            //            throw new Exception(ex.Message);
            //        }
            //        return ds;
            //    }
            //}

            List<DataParameter> table = new List<DataParameter>();
            foreach (SqlParameter para in cmdParms)
            {
                DataParameter dp = new DataParameter();
                dp.ParameterName = para.ParameterName;
                dp.Value = para.Value;
                dp.DbType = para.DbType;
                table.Add(dp);
            }

            return DataAccess.Instance("BizDB").ExecuteDataSet(SQLString, table);
        }


        //private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
        //{
        //    if (conn.State != ConnectionState.Open)
        //        conn.Open();
        //    cmd.Connection = conn;
        //    cmd.CommandText = cmdText;
        //    if (trans != null)
        //        cmd.Transaction = trans;
        //    cmd.CommandType = CommandType.Text;//cmdType;
        //    if (cmdParms != null)
        //    {


        //        foreach (SqlParameter parameter in cmdParms)
        //        {
        //            if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
        //                (parameter.Value == null))
        //            {
        //                parameter.Value = DBNull.Value;
        //            }
        //            cmd.Parameters.Add(parameter);
        //        }
        //    }
        //}

        #endregion

        #region 存储过程操作

        /// <summary>
        /// 执行存储过程，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlDataReader</returns>
        //public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlConnection connection = new SqlConnection(connectionString);
        //    SqlDataReader returnReader;
        //    connection.Open();
        //    SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
        //    command.CommandType = CommandType.StoredProcedure;
        //    returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
        //    return returnReader;
            
        //}


        ///// <summary>
        ///// 执行存储过程
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <param name="tableName">DataSet结果中的表名</param>
        ///// <returns>DataSet</returns>
        //public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        DataSet dataSet = new DataSet();
        //        connection.Open();
        //        SqlDataAdapter sqlDA = new SqlDataAdapter();
        //        sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
        //        sqlDA.Fill(dataSet, tableName);
        //        connection.Close();
        //        return dataSet;
        //    }
        //}
        //public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        DataSet dataSet = new DataSet();
        //        connection.Open();
        //        SqlDataAdapter sqlDA = new SqlDataAdapter();
        //        sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
        //        sqlDA.SelectCommand.CommandTimeout = Times;
        //        sqlDA.Fill(dataSet, tableName);
        //        connection.Close();
        //        return dataSet;
        //    }
        //}


        ///// <summary>
        ///// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
        ///// </summary>
        ///// <param name="connection">数据库连接</param>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <returns>SqlCommand</returns>
        //private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlCommand command = new SqlCommand(storedProcName, connection);
        //    command.CommandType = CommandType.StoredProcedure;
        //    foreach (SqlParameter parameter in parameters)
        //    {
        //        if (parameter != null)
        //        {
        //            // 检查未分配值的输出参数,将其分配以DBNull.Value.
        //            if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
        //                (parameter.Value == null))
        //            {
        //                parameter.Value = DBNull.Value;
        //            }
        //            command.Parameters.Add(parameter);
        //        }
        //    }

        //    return command;
        //}

        ///// <summary>
        ///// 执行存储过程，返回影响的行数		
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <param name="rowsAffected">影响的行数</param>
        ///// <returns></returns>
        //public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        int result;
        //        connection.Open();
        //        SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
        //        rowsAffected = command.ExecuteNonQuery();
        //        result = (int)command.Parameters["ReturnValue"].Value;
        //        //Connection.Close();
        //        return result;
        //    }
        //}

        ///// <summary>
        ///// 创建 SqlCommand 对象实例(用来返回一个整数值)	
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <returns>SqlCommand 对象实例</returns>
        //private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
        //    command.Parameters.Add(new SqlParameter("ReturnValue",
        //        SqlDbType.Int, 4, ParameterDirection.ReturnValue,
        //        false, 0, 0, string.Empty, DataRowVersion.Default, null));
        //    return command;
        //}
        #endregion

    }

}
